<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../dist/vue.js"></script>
</head>
<body>
    <div id="box">
        <input type="text">
        <button @click="onAdd">add</button>

        <ul>
            <li v-for="item in list">{{item}}</li>
        </ul>
    </div>
    <script>
        new Vue({
            el:"#box",
            data: {
                list:[111,222,333]
            },
            methods: {
                onAdd(){
                    console.log(add)
                }
            }
        })
    </script>
</body>
</html>